Effect of long-term antihypertensive treatment on cerebrovascular structure and function in hypertensive rats
Scientific Reports, ISSN: 2045-2322, Vol: 13, Issue: 1, Page: 3481
2023
- 5Citations
- 12Captures
- 1Mentions
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Metrics Details
- Citations5
- Citation Indexes5
- Captures12
- Readers12
- 12
- Mentions1
- News Mentions1
- 1
Most Recent News
Amsterdam University Medical Center Reports Findings in Antihypertensives (Effect of long-term antihypertensive treatment on cerebrovascular structure and function in hypertensive rats)
2023 MAR 10 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Daily Daily -- New research on Drugs and Therapies -
Article Description
Midlife hypertension is an important risk factor for cognitive impairment and dementia, including Alzheimer’s disease. We investigated the effects of long-term treatment with two classes of antihypertensive drugs to determine whether diverging mechanisms of blood pressure lowering impact the brain differently. Spontaneously hypertensive rats (SHR) were either left untreated or treated with a calcium channel blocker (amlodipine) or beta blocker (atenolol) until one year of age. The normotensive Wistar Kyoto rat (WKY) was used as a reference group. Both drugs lowered blood pressure equally, while only atenolol decreased heart rate. Cerebrovascular resistance was increased in SHR, which was prevented by amlodipine but not atenolol. SHR showed a larger carotid artery diameter with impaired pulsatility, which was prevented by atenolol. Cerebral arteries demonstrated inward remodelling, stiffening and endothelial dysfunction in SHR. Both treatments similarly improved these parameters. MRI revealed that SHR have smaller brains with enlarged ventricles. In addition, neurofilament light levels were increased in cerebrospinal fluid of SHR. However, neither treatment affected these parameters. In conclusion, amlodipine and atenolol both lower blood pressure, but elicit a different hemodynamic profile. Both medications improve cerebral artery structure and function, but neither drug prevented indices of brain damage in this model of hypertension.
Bibliographic Details
Springer Science and Business Media LLC
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